yes, Dave has hit it. here are the outputs for the two variables:
double hoehe(uni) ;
hoehe:missing_value = -9999. ;
hoehe:long_name = "hoehe" ;
hoehe:standard_name = "hoehe" ;
hoehe:coordinates = "x y" ;
double Precipitation(uni) ;
Precipitation:units = "km" ;
Precipitation:missing_value = -9999. ;
Precipitation:long_name = "Daily precipitation data recorded at
Swiss climate stations" ;
Not that coordinates are defined for elevation, not precipitation.
-Roy
On Jul 28, 2010, at 9:39 AM, David Pierce wrote:
> Hi Annelie,
>
> I'm the author of the ncdf package for R. Thanks for using it!
>
> It looks to me like ArcGIS is using the "coordinate" attribute to figure
> this information out. Try adding the following line right after the
> "var.def.ncdf":
>
> att.put.ncdf( my.nc, varz, "coordinates", "x y" )
>
> Regards,
>
> --Dave
>
>
> annelie.holzkaemper@xxxxxxxxxxxx wrote:
>> Hi Roy,
>> thanks for the fast response. I attached the two versions of the netCDF
>> file (before and after running the R script).
>> I haven't tried to use ncdump yet, but I will.
>>
>> Annelie
>>
>> -----Ursprüngliche Nachricht-----
>> Von: Roy Mendelssohn [mailto:Roy.Mendelssohn@xxxxxxxx]
>> Gesendet: Wednesday, July 28, 2010 5:58 PM
>> An: Holzkaemper Annelie ART
>> Cc: netcdfgroup@xxxxxxxxxxxxxxxx
>> Betreff: Re: [netcdfgroup] transfering netCDF-file from R to ArcGIS
>>
>> Hi Annelie:
>>
>> Since this involves a lot more than netcdf (R, ArcGIS), a little more
>> info would help. Do you access to the ncdump utility? Can you do an
>> "ncdump -h" on the files with and without precipitation? otherwise, if
>> the files aren't toobig, can you send them somehow.
>>
>> Also, the ArcGIS netcdf import is (unfortunately) known to be buggy.
>>
>> -Roy
>>
>> On Jul 28, 2010, at 8:27 AM, annelie.holzkaemper@xxxxxxxxxxxx wrote:
>>
>>> Hi,
>>> I am trying to generate a NetCDF file in R that can be imported in
>>> ArcGIS using the "Make NetCDF Feature Layer" tool (it is supposed to
>>> store time series data for each climate station). I have used an ArcGIS
>>> point-shapefile and converted it into a NetCDF file that I can use as a
>>> template. This file has 1 dimension (the point ID) and 3 variables (x
>>> coordinate, y coordinate, elevation). It can easily be imported to
>>> ArcGIS using "Make NetCDF Feature Layer".
>>> But now I want to add a new variable ("precipitation") to the
>>> netcdf-file in R:
>>>
>>>>> library(ncdf)
>>>>> my.nc = open.ncdf("C:/temp/pointtest8.nc", write=TRUE)
>>>
>>>>> dim_id <- my.nc$dim[[1]]
>>>
>>>>> varz = var.def.ncdf("Precipitation","km", list(dim_id), -9999,
>>> longname="Daily precipitation", prec="double")
>>>
>>>>> my.nc <- var.add.ncdf(my.nc, varz)
>>>
>>>>> close.ncdf(my.nc)
>>>
>>>
>>> If I try to import the file modified with R into ArcGIS ("Make NetCDF
>>> Feature Layer") and choose "precipitation" instead of "elevation" as a
>>> variable, I can not choose the x and y variables (there are no options
>>> in the drop down list). However, it is still possible to choose the x
>>> and y variables for "elevation". So, there seems to be some sort of link
>>> between the original variable "elevation" and the x- and y-variables
>>> that I have not defined for my new variable "precipitation" in R. What
>>> could be wrong with my definition of the new variable?
>>>
>>> I would be very grateful for any suggestions!
>>>
>>> Cheers,
>>> Annelie
>>>
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> netcdfgroup mailing list
>>> netcdfgroup@xxxxxxxxxxxxxxxx
>>> For list information or to unsubscribe, visit:
>>> http://www.unidata.ucar.edu/mailing_lists/
>>
>> **********************
>> "The contents of this message do not reflect any position of the U.S.
>> Government or NOAA."
>> **********************
>> Roy Mendelssohn
>> Supervisory Operations Research Analyst
>> NOAA/NMFS
>> Environmental Research Division
>> Southwest Fisheries Science Center
>> 1352 Lighthouse Avenue
>> Pacific Grove, CA 93950-2097
>>
>> e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address)
>> voice: (831)-648-9029
>> fax: (831)-648-8440
>> www: http://www.pfeg.noaa.gov/
>>
>> "Old age and treachery will overcome youth and skill."
>> "From those who have been given much, much will be expected"
>>
>> _______________________________________________
>> netcdfgroup mailing list
>> netcdfgroup@xxxxxxxxxxxxxxxx
>> For list information or to unsubscribe, visit:
>> http://www.unidata.ucar.edu/mailing_lists/
>
>
> -------------------------------------------------------------------
> David W. Pierce
> Division of Climate, Atmospheric Science, and Physical Oceanography
> Scripps Institution of Oceanography
> (858) 534-8276 (voice) / (858) 534-8561 (fax) dpierce@xxxxxxxx
> -------------------------------------------------------------------
>
>
**********************
"The contents of this message do not reflect any position of the U.S.
Government or NOAA."
**********************
Roy Mendelssohn
Supervisory Operations Research Analyst
NOAA/NMFS
Environmental Research Division
Southwest Fisheries Science Center
1352 Lighthouse Avenue
Pacific Grove, CA 93950-2097
e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address)
voice: (831)-648-9029
fax: (831)-648-8440
www: http://www.pfeg.noaa.gov/
"Old age and treachery will overcome youth and skill."
"From those who have been given much, much will be expected"
